In this hilarious video, you can see a girl give her sister the scare ... sister's room and sets it free. The sister, scared of the moths, screams and jumps away to dash into another room.

And while there's no exact formula, there are certain time-tested secrets you can include to create a truly terrifying jump scare, according to this woman... Rebekah McKendry: My students kind of ...

The battered girl moves with heavy fatigue yet is electrifyingly ... scary as this early sequence. Smile relies on jump scares and gore. A birthday party goes very wrong in "Smile." ...